H8SSLASH2218 datasheet(22/750 Pages) RENESAS

22 / 750 page

Rev.6.00 Jun. 03, 2008 Page xx of xlvi

REJ09B0074-0600

10.5

Usage Notes.......................................................................................................................346

10.5.1 Notes on Register Access .....................................................................................346

10.5.2 Contention between Timer Counter (TCNT) Write and Increment......................347

10.5.3 Changing Value of CKS2 to CKS0 ......................................................................348

10.5.4 Switching between Watchdog Timer Mode and Interval Timer Mode ................348

10.5.5 Internal Reset in Watchdog Timer Mode .............................................................348

10.5.6 OVF Flag Clearing in Interval Timer Mode.........................................................348

Section 11 Realtime Clock (RTC) ..................................................................................349

11.1

Features .............................................................................................................................349

11.2

Input/Output Pin ................................................................................................................350

11.3

Register Descriptions.........................................................................................................350

11.3.1 Second Data Register (RSECDR) ........................................................................350

11.3.2 Minute Data Register (RMINDR) ........................................................................351

11.3.3 Hour Data Register (RHRDR)..............................................................................352

11.3.4 Day-of-Week Data Register (RWKDR)...............................................................353

11.3.5 RTC Control Register 1 (RTCCR1) .....................................................................354

11.3.6 RTC Control Register 2 (RTCCR2) .....................................................................355

11.3.7 Clock Source Select Register (RTCCSR) ............................................................356

11.3.8 Extended Module Stop Register (EXMDLSTP) ..................................................357

11.4

Operation ...........................................................................................................................358

11.4.1 Initial Settings of Registers after Power-On and Resetting Procedure .................358

11.4.2 Time Data Reading Procedure..............................................................................359

11.5

Interrupt Source .................................................................................................................360

11.6

Operating State in Each Mode...........................................................................................361

11.7

Usage Notes.......................................................................................................................362

Section 12 Serial Communication Interface.................................................................363

12.1

Features .............................................................................................................................363

12.1.1 Block Diagram .....................................................................................................365

12.2

Input/Output Pins ..............................................................................................................367

12.3

Register Descriptions.........................................................................................................367

12.3.1 Receive Shift Register (RSR) ...............................................................................368

12.3.2 Receive Data Register (RDR) ..............................................................................368

12.3.3 Transmit Data Register (TDR) .............................................................................368

12.3.4 Transmit Shift Register (TSR)..............................................................................368

12.3.5 Serial Mode Register (SMR) ................................................................................369

12.3.6 Serial Control Register (SCR) ..............................................................................373

12.3.7 Serial Status Register (SSR) .................................................................................377

12.3.8 Smart Card Mode Register (SCMR) ....................................................................383

12.3.9 Serial Extended Mode Register A_0 (SEMRA_0) ...............................................384

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